Insulator for an open coil electric heating unit



FIG. 1 is a perspective view of an insulator for open coil electricheating unit showing my new design;

FIG. 2 is a front elevational view of the same, the rear view being amirror image,

FIG. 3 is a top plan view of the same,

FIG. 4 is a side elevational view, and

FIG. 5 is a sectional view corresponding to the line 5--5 of FIG. 2.

The ornamental design for an insulator for an open coil electric heatingunit, substantially as shown and described.